### Biography

Paulo Leal Ferreira, Brazilian physicist (Rio de Janeiro 16 July 1925 – São Paulo 30 December 2005)

### SOME CONTRIBUTIONS

With J.A.C. Alcaras & A.P. Galeão. A model of the deuteron based on a Breit type equation. Mod. Phys. Lett. A9 (14):1327-33, 1994

With A.P. Galeão. General method for reducing the 2-body Dirac equation. J. Mathem. Physics 33(7):2618-25, 1992

With J.A. Helayel & N. Zagury. A linear potential model for quark confinement. Nuovo Cimento 55(2):215-26, 1980

A theorem for a class of motions in a spherical geometry. J. Physics A: Mathem. General 16(9):2087-91, 1983

With M.B. Santos. Gradient formula for the four dimensional hyperspherical harmonics. Rev. Bras. Fis. 5:61, 1975

SU(3)xSO(3) Three triplet model and the new resonances. Rev. Bras. Fisica (1975)

With D. Ito. Phenomenological mass operator for hadrons 1 & 2. Lett. Nuovo Cimento 5(15):998-04, 1972

With J.L. Ferreira. Hydrogen-like quark model for baryons. Lett. Nuovo Cimento 3(2):43, 1970

With A.P.G. Malbonissou. On deviations from Newton’s law and the proposal for a fifth force.

With H. Joos. Modified WKB approximation for Bothe’s differential equation in diffusion theory. Anais Acad. Bras. Ciencias 45(2):336, 1967

With H. Fagundes. Integral equation and addition theorem for hyperspherical harmonics. Anais Acad. Bras. Ciencias (1964)

### HONOURS

Associate Elected Member, International Centre for Theoretical Physics, Trieste, Italy (1973-8)

His brother, Jorge Leal** **Ferreira, physicist (30 March 1928 – 26 February 1995)

With P.L. Ferreira. Hydrogen-like quark model for baryons. Lett. Nuovo Cimento 3(2):43, 1970

With A.H. Zimerman. On a simple model for axial mesons. Il Nuovo Cimento (1967)

With J. Soffer. Low energy theorem for radiative decays of hyperons. Physics Review (1967)